i put the new pcm in and got it running. there is no tune its a stock pcm. That was to try and rule out a bad pcm. Im having BAD fuel problems 7 fuel pumps in a year and a half. Not sure why. Runs good when the pump is replaced but the pump will only put out pressure for a few months and i have to get another one. I have a 4.3 so the FPR is under the intake manifold on the spider injector.